declare class UnitBezier {
    constructor(p1x: number, p1y: number, p2x: number, p2y: number);

    sampleCurveX(t: number): number;
    sampleCurveY(t: number): number;
    sampleCurveDerivativeX(t: number): number;
    solveCurveX(x: number, epsilon?: number): number;
    solve(x: number, epsilon?: number): number;
}

declare module UnitBezier { }

declare module "@mapbox/unitbezier" {
    export = UnitBezier;
}